cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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board-ingenic.c (3964B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Support for Ingenic SoCs
      4 *
      5 * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
      6 * Copyright (C) 2011, Maarten ter Huurne <maarten@treewalker.org>
      7 * Copyright (C) 2020 Paul Cercueil <paul@crapouillou.net>
      8 */
      9
     10#include <linux/clk.h>
     11#include <linux/of.h>
     12#include <linux/of_address.h>
     13#include <linux/of_fdt.h>
     14#include <linux/pm.h>
     15#include <linux/sizes.h>
     16#include <linux/suspend.h>
     17#include <linux/types.h>
     18
     19#include <asm/bootinfo.h>
     20#include <asm/machine.h>
     21#include <asm/reboot.h>
     22
     23static __init char *ingenic_get_system_type(unsigned long machtype)
     24{
     25	switch (machtype) {
     26	case MACH_INGENIC_X2100:
     27		return "X2100";
     28	case MACH_INGENIC_X2000H:
     29		return "X2000H";
     30	case MACH_INGENIC_X2000E:
     31		return "X2000E";
     32	case MACH_INGENIC_X2000:
     33		return "X2000";
     34	case MACH_INGENIC_X1830:
     35		return "X1830";
     36	case MACH_INGENIC_X1000E:
     37		return "X1000E";
     38	case MACH_INGENIC_X1000:
     39		return "X1000";
     40	case MACH_INGENIC_JZ4780:
     41		return "JZ4780";
     42	case MACH_INGENIC_JZ4775:
     43		return "JZ4775";
     44	case MACH_INGENIC_JZ4770:
     45		return "JZ4770";
     46	case MACH_INGENIC_JZ4760B:
     47		return "JZ4760B";
     48	case MACH_INGENIC_JZ4760:
     49		return "JZ4760";
     50	case MACH_INGENIC_JZ4755:
     51		return "JZ4755";
     52	case MACH_INGENIC_JZ4750:
     53		return "JZ4750";
     54	case MACH_INGENIC_JZ4725B:
     55		return "JZ4725B";
     56	case MACH_INGENIC_JZ4730:
     57		return "JZ4730";
     58	default:
     59		return "JZ4740";
     60	}
     61}
     62
     63static __init const void *ingenic_fixup_fdt(const void *fdt, const void *match_data)
     64{
     65	/*
     66	 * Old devicetree files for the qi,lb60 board did not have a /memory
     67	 * node. Hardcode the memory info here.
     68	 */
     69	if (!fdt_node_check_compatible(fdt, 0, "qi,lb60") &&
     70	    fdt_path_offset(fdt, "/memory") < 0)
     71		early_init_dt_add_memory_arch(0, SZ_32M);
     72
     73	mips_machtype = (unsigned long)match_data;
     74	system_type = ingenic_get_system_type(mips_machtype);
     75
     76	return fdt;
     77}
     78
     79static const struct of_device_id ingenic_of_match[] __initconst = {
     80	{ .compatible = "ingenic,jz4730", .data = (void *)MACH_INGENIC_JZ4730 },
     81	{ .compatible = "ingenic,jz4740", .data = (void *)MACH_INGENIC_JZ4740 },
     82	{ .compatible = "ingenic,jz4725b", .data = (void *)MACH_INGENIC_JZ4725B },
     83	{ .compatible = "ingenic,jz4750", .data = (void *)MACH_INGENIC_JZ4750 },
     84	{ .compatible = "ingenic,jz4755", .data = (void *)MACH_INGENIC_JZ4755 },
     85	{ .compatible = "ingenic,jz4760", .data = (void *)MACH_INGENIC_JZ4760 },
     86	{ .compatible = "ingenic,jz4760b", .data = (void *)MACH_INGENIC_JZ4760B },
     87	{ .compatible = "ingenic,jz4770", .data = (void *)MACH_INGENIC_JZ4770 },
     88	{ .compatible = "ingenic,jz4775", .data = (void *)MACH_INGENIC_JZ4775 },
     89	{ .compatible = "ingenic,jz4780", .data = (void *)MACH_INGENIC_JZ4780 },
     90	{ .compatible = "ingenic,x1000", .data = (void *)MACH_INGENIC_X1000 },
     91	{ .compatible = "ingenic,x1000e", .data = (void *)MACH_INGENIC_X1000E },
     92	{ .compatible = "ingenic,x1830", .data = (void *)MACH_INGENIC_X1830 },
     93	{ .compatible = "ingenic,x2000", .data = (void *)MACH_INGENIC_X2000 },
     94	{ .compatible = "ingenic,x2000e", .data = (void *)MACH_INGENIC_X2000E },
     95	{ .compatible = "ingenic,x2000h", .data = (void *)MACH_INGENIC_X2000H },
     96	{ .compatible = "ingenic,x2100", .data = (void *)MACH_INGENIC_X2100 },
     97	{}
     98};
     99
    100MIPS_MACHINE(ingenic) = {
    101	.matches = ingenic_of_match,
    102	.fixup_fdt = ingenic_fixup_fdt,
    103};
    104
    105static void ingenic_wait_instr(void)
    106{
    107	__asm__(".set push;\n"
    108		".set mips3;\n"
    109		"wait;\n"
    110		".set pop;\n"
    111	);
    112}
    113
    114static void ingenic_halt(void)
    115{
    116	for (;;)
    117		ingenic_wait_instr();
    118}
    119
    120static int __maybe_unused ingenic_pm_enter(suspend_state_t state)
    121{
    122	ingenic_wait_instr();
    123
    124	return 0;
    125}
    126
    127static const struct platform_suspend_ops ingenic_pm_ops __maybe_unused = {
    128	.valid = suspend_valid_only_mem,
    129	.enter = ingenic_pm_enter,
    130};
    131
    132static int __init ingenic_pm_init(void)
    133{
    134	if (boot_cpu_type() == CPU_XBURST) {
    135		if (IS_ENABLED(CONFIG_PM_SLEEP))
    136			suspend_set_ops(&ingenic_pm_ops);
    137		_machine_halt = ingenic_halt;
    138	}
    139
    140	return 0;
    141
    142}
    143late_initcall(ingenic_pm_init);